Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
dinh cua » dinh cuu, sinh cua, dinh cu
ky lang » ky dang, ky tang, tay lang
va hanh » van hanh, va danh, ban hanh
va cam » va cham, va cac, va cao
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ky lang) or (ky nang)) xa hoi. lieu va cam xuc ((va hanh) OR (va thanh)) dinh cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky lang) OR (ky nang)) xa hoi. lieu va cam xuc ((va hanh) OR (va thanh)) dinh cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky lang) or (ky nang)) xa hoi. lieu va cam xuc ((va hanh) OR (va thanh)) dinh cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky lang) or (ky nang)) xa hoi. lieu va cam xuc ((va hanh) OR (va thanh)) dinh cua te*.